I'd say is a, since the point of a persuasive essay is to give your opinion backed up by research with proof typically, however due to the wording by saying 'references' I don't believe it's b.
Hoped it helped! c:
- Kat
Here some examples I’d like to go to the beach. I hope to go on a cruise. I want to go to Canada. I’d love to go to Disney
C. This barbecued rib sauce is tangier than that sauce.